Steam-boiler



J. W. MOORE.

STEAM BOILER.

('No Model.)

Patented Apr. 25

PETERS. fimmumo n m. Wahin hm ac.

UNITED STATES PATENT OFFICE.

J. WILLlAM MOORE, OF PITTSBURG, PENNSYLVANIA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 257,045, dated. April 25, 1882.

Application filed September 22, 1881.

To all whom it may concern:

Be it known that I, J. WILLIAM MOORE, of Pittsburg. in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Steam -Boilers; and I do hereby declare the following to be afull, clear, and exact description thereof, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1 is a vertical cross-section on the line :0 .r, Fig. 2, of my improved steam-boiler; and Fig. 2 is a longitudinal vertical section on the line 3 y, Fig. 1, of the same.

Like letters of reference indicate like parts in each.

y invention relates to certain improvements in cylindrical boilers for generating steam, its object being to increase the radiating-surface of the boilers and hold more water in suspension in the hottest part of the furnace.

1t consists essentially in combining with a battery of two or more cylindrical boilers located above the boiler-furnace and extending back longitudinally of the furnace-draft a series of horizontal transverse water-fines connecting the sides of the different boilers, and a series of extensions of these fines projecting beyond the end boiler or boilers of the battery, the said water-fines and their extensions extending across the fire-chamber in the direct .backward draft of the furnace.

Heretofore cylindrical boilers have been formed with a series of transverse water-chambers or mud-drums connecting with the boilers at the bottom thereof, the heated products of combustion passing partly, and in some cases entirely, around these water-chambers on their way to the stack, and the chambers being provided with means for withdrawing the mud or sediment which would sink into (No model.)

verse water-lines between the boilers, the products of combustion passing back through the dues and forward through the space between the boilers across which the water-fines pass. In these, however, the products of combustion only came in contact with the water-fines on their return, and consequently the water in the lines was not so highly heated as when exposed to the flame, and the direct backward draft from the furnace circulates around them. By my improvement the boilers are connected by a series of transverse water-fines which do not necessitate the alteration of the furnace or manner of supporting the boilers, so that they can be applied to the ordinary cylindrical boilers now in use, .and will hold a large amount of water in the direct backward draft of the furnace, the flames and .heated products of combustion striking against and circulating entirely around these transverse flues on their passage from the grate to the back of the boilers.

In the drawings, A A represent a battery of cylindrical flue-boilers, there being four boilers in the battery shown, my' invenion being applicable for use with a battery of any number-from two upward. The boilers are mounted above the ordinary furnace, B, longitudinally of the furnace-draft, the flame and products of combustion passing back under and between the dilferent boilers and forward through the smokeflnes G to the smokestack D.

E E represent my improved horizontal transverse water-fines, which are formed of wrough tiron and are secured to the boilers by riveting in the usual manner, and extend out from the sides of one boiler to the other across the firespace of the furnace, as shown. They may be of any desired diameter, but in the ordinary forty-two-inch boilers arepreferably made from ten to fifteen inches in diameter, so that full space is given for the circulation of the water through these Water-fines into the different boilers of the battery. They are generally connected to the different boilers in such position that the base of the flue is a few inches above the base of the boilers, so that the current between the different boilers will wash the sediment and other impurities out of the water-fines into the base of the boilers, from which they may be removed in the usual manner. The water-flues extend at intervals from the sides of the boilers,the front flue being near the water in the boilers composing the battery is obtained. In order to obtain still further heating-surface in the battery of boilers, and to arrange for cleaning the water-flues, extensions F of the flues are carried on either side of the end boilers through the inclosing-walls G of the furnace, and hand-holes g are formed in the ends of these extensions.

The furnaceB is provided with any desired grate, b, fire-bridge h, and doors 7c, and the brickwork 1 between the several boilers, and the side walls, G, ofthe furnace are built so that the flame and products of combustion can circulate entirely around the transverse flues E and their extensions F.

The battery has the usual feed-water connections and gage-cocks; but it is only necessary to have these arranged in one of the boilers, as the circulation of the water is so perfect through all the boilers that the water will be sustained at the same height in all. It is also provided with the usual steam-drum.

The operation of my invention is as follows: The flame and heated products of combustion, instead of passing back along the base and sides and a large portion between the boilers without coming in contact with them, necessarily strike against these horizontal transverse water-flues and circulate entirely around them, these flues greatly increasing the heating and radiating surface of the boilers and holding the water in the direct backward draft and hottest part of the furnace, so that the proportionate generation of steam from the same amount of fuel is largely increased. The flue-extensionsF stillfurther increase the heating and radiating surface and the proportionate amount of steam generated. As the water in the transverse flues is heated much more rapidly than that in the boilers themselves, there is necessarily a continual current from one boiler to the other through these transverse flues, which serves to wash the sediment out of the flues into the boilers, and also to prevent the formation of scale, the currents through the water-flues every few feet in the boilers preventing the cakin g or hardening of the sediment. 'On account of the free circulation of the water between the several boilers, the water is sustained at an even height in all the boilers and a more even generation of steam obtained.

In cleaning the transverse flues all that is necessary is to open the hand-holes at one or both ends of the flue-extensions, when the entire flues between the'several boilers of the battery can be cleaned by suitable tools. Where one side of the battery of boilers is builtagainst a blank wall the hand-holes may be formed in the flue-extensions at the other side of the battery and all the flues cleaned from this end or side.

I am aware of Letters Patent granted to 0. Spencer, May 5,1868, in which several boilers were connected by a single flue extending between the boilers below the water-line, and hence do not elai m this broadly. In the boilers as shown in that patent, however, the boilers were located transversely of the furnacedraft and the water-flue extended in the direction of the draft, so that the water was held above the draft, and not across it, in the hottest part of the furnace. In myimproved boiler the series of transverse flues extend across the fire-chamber in the direct backward draft and hottest part of the furnace, where theflame and heated products break against and circulate entirely around them on their passage to the back of the boilers, so that a large amount of steam is generated thereby, and the series of flues give a much more perfect circulation through the different boilers.

What I claim as my invention, and desire to secure by Letters Patent, is

In combination with a battery of two or more cylindrical boilers,A A,located above the boiler-furnace B and extending back longitudinally of the furnace-draft, a series of horizontal transverse water-flues, E E, connecting the sides of the different boilers and extending across the fire-chamber in the direct backward draft of the furnace, and a series of water-flue extensions, F I projecting beyond the end boiler or boilers of the battery, substantially as and for the purposes set forth.

In testimony whereof I, the said J. WILLIAM MOORE, have hereunto set my hand.

JOHN WILLIAM MOORE.

Witnesses: f

JAMES I. KAY, F. G. KAY. 

